Neil deGrasse Tyson: The Brilliant Way Ultraviolet & Infrared Light Was Discovered

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3:23 you can see the look of frustration in the guy because NGT always interrupts literally everybody he ever talks to...

bennywolf
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Thank you! Mr De Grasse for your clever synopsis of things scientific 😅😊

stevenmyriam-
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Infrared light is all around us. He implied that the thermometer was measuring the ambient light. The prism impedes the sunlight, therefore slowing it down which means it's cooler than the ambient light around it.

SunShine-kdtd